四倍

The investigation results show that the shrubs diameter apart from root 50 mm mostly shall not exceed 15mm, such as Caragana Korshinskii Kom, Vitex, Fourfold Acacia, and Grewia biloba var.parviflora. The moisture content of the above shrubs is about 55%, 55%, 61% and 50% separately in late autumn and winter when they are reaped.

通过实地调查研究和统计分析适值收割的柠条等几种常见灌木的距地50 mm左右处的直径一般不超过15 mm，适宜收割期间柠条含水率为55%左右，荆条含水率为55%左右，四倍体刺槐含水率为61%左右，扁担木含水率为50%左右。

According to the order, the data of Caragana Korshinskii Kom is about 6.07 J/cm~2, 23.67 MPa, and 1787.98 MPa separately, and the data of Vitex is about 11.78 J/cm~2, 48.06 MPa and 3544.36 MPa separately. Additionally, the data of Fourfold Acacia is about 10.09 J/cm~2, 40.78 MPa and 2304.87 MPa , whereas the data of Grewia biloba var.parviflora is about 8.47 J/cm~2, 65.88MPa and 2523.88MPa respectively. The impact toughness four shrubs is in the bound of the data of wood in China, but the compressive strength and compression elastic modulus parallel to grain are some small than those of ordinary wood.

柠条的冲击强度为6.07J/cm~2，顺纹抗压强度为23.67MPa，顺纹抗压弹性模量(来源：AB75C论文网www.abclunwen.com)为1787.98MPa；荆条的冲击强度为11.78J/cm~2，顺纹抗压强度为48.06 MPa，顺纹抗压弹性模量为3544.36MPa；四倍体刺槐冲击强度为10.09 J/cm~2，顺纹抗压强度为40.78 MPa，顺纹抗压弹性模量为2304.87 MPa；扁担木的冲击强度为8.47J/cm~2，顺纹抗压强度为65.88MPa，顺纹抗压弹性模量为2523.88 MPa。

Long treatments(7–43 min — about three quarters of the period of meiosis I in triploid eggs). yielded only heptaploid cells among the embryos.

在抑制三倍体受精卵第一极体（PB1）过程中，处理时间的不同对后代四倍体的得率有明显影响。

Short treatments (15–35 min after fertilization — about half the period of meiosis 1 in triploid eggs).yielded tetraploid and heptaploid cells.

因此，本试验试图利用Guo和Allen的方法对四倍体诱导中的一些基本条件进行优化。

The results showed that autote traploid rice might be effectively improved by ion beam bio-technique, from which the new germplasm with hereditable twin-embryo seedling could be selected.

结果表明，利用离子注入技术可以对同源四倍体水稻进行有效地改良，由此可以获得具有遗传变异特点的新种质，其双胚苗特性随着自交世代的推进而得到保持。

The results indicated that the concentration of Cu in the soil is 220.16 mgkg^(-1) contrast to the CK 500.31 mgkg^(-1) significantly decrease when the concentration of EDTA in the soil is 2 mmolkg^(-1) that explains EDTA treatment significantly decreased soluble Cu content in soil because of translating into Cu of water distill floating on the surface of soil and most accumulating around root. Contemporary, application of EDTA to the soil significantly enhanced mobilization of Cu in soil and increased Cu uptake in shoot of Leersia hexandra Swartz., the highest concentration in the leaves 336.54 mgkg^(-1) is 4 times higher compared with the ck 80.34 mgkg^(-1). However, citric acid, oxalic acid and malic acid inhibited mobilization of Cu and less significantly affected shoot Cu accumulation.

结果表明，当向土壤中施加质量摩尔浓度为2mmolkg^(-1)的EDTA时，土壤中Cu质量分数为220.16mgkg^(-1)与空白土壤中500.31mgkg^(-1)相比明显减少，说明EDTA可以极显著的降低土壤中的铜质量分数，使其转化成水提取态的Cu浮于土壤表面，并大部分聚集在根部周围，同时向土壤中施加EDTA不但促进了对Cu的活化而且显著提高了李氏禾对Cu的吸收，叶中最高质量分数达到336.54mgkg^(-1)是对照中80.34mgkg^(-1)的四倍；而柠檬酸、草酸和酒石酸则抑制了Cu的活化，但对李氏禾地上部分的Cu质量分数影响不大。

I eat almost no junk food. I eat about three or four times as many plant foods as before; probably 50 percent or more of my calories come from nonanimal sources.

我几乎不怎么吃垃圾食品了，我现在吃的素食是以前的三到四倍；差不多50%的热量都是从这些素食中摄取。

The results indicated that the highest tetraploid induction rate could reach 23.4% when the leaves precultured on the optimal organogenetic MS medium for 12d and treated with 10 mg/L colchione on the double layer media for 24h in vitro.

结果表明，预培养12d的兰考泡桐叶片在秋水仙素浓度为10mg/L的双层培养基上预培养处理24h时，四倍体诱导率最高达到23.4%。

Pled their profits in ten years .

他们的利润十年中增长至四倍。

Past research showed that cigarette smokers are four times more likely to get pneumococcal diseases than nonsmokers.

过去的研究表明，吸烟者患肺炎的几率是非吸烟者的四倍。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。